GB2378919A - Damp-proof course - Google Patents

Damp-proof course Download PDF

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Publication number
GB2378919A
GB2378919A GB0215510A GB0215510A GB2378919A GB 2378919 A GB2378919 A GB 2378919A GB 0215510 A GB0215510 A GB 0215510A GB 0215510 A GB0215510 A GB 0215510A GB 2378919 A GB2378919 A GB 2378919A
Authority
GB
United Kingdom
Prior art keywords
damp
foam
bonded
proof course
synthetic polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0215510A
Other versions
GB0215510D0 (en
GB2378919B (en
Inventor
Simon Brown
David Brian George
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RUBEROID BUILDING PRODUCTS Ltd
Original Assignee
RUBEROID BUILDING PRODUCTS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RUBEROID BUILDING PRODUCTS Ltd filed Critical RUBEROID BUILDING PRODUCTS Ltd
Publication of GB0215510D0 publication Critical patent/GB0215510D0/en
Publication of GB2378919A publication Critical patent/GB2378919A/en
Application granted granted Critical
Publication of GB2378919B publication Critical patent/GB2378919B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/046—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/64—Insulation or other protection; Elements or use of specified material therefor for making damp-proof; Protection against corrosion
    • E04B1/644—Damp-proof courses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/08—Closed cell foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Laminated Bodies (AREA)

Abstract

A bonded damp-proof course (1) comprises a flexible, water-impermeable sheet (2) and a rigid fire-resistant thermosetting synthetic polymer foam (4). The polymer foam may have a facing (3, 5) on one or both sides. The water-impermeable sheet may be polyethylene, modified polypropylene, ethylene propylene diamine monomer (EPDM) rubber, butyl rubber, bitumen polymer, plasticised polyvinyl chloride, pitch/PVC or polyvinyl. The foam may be polyisocyanate foam or polyurethane which have been treated with fire-retardant chemicals, polyfuran foam or phenol-formaldehyde foam. The facing may be glass fibre tissue, aluminium foil, paper or glass reinforced paper.

Description

<Desc/Clms Page number 1>
Damp-proof course This invention relates to a fire-resistant insulating damp-proof course.
GB 2289433 discloses a damp-proof course comprising compressible mineral fibre insulation bonded to a flexible water-impermeable sheet.
GB 2297770 discloses a flexible damp-proof course comprising mineral fibre insulation in the form of compressible inert vitreous silicate wool bonded to a flexible water-impermeable sheet.
Damp-proof courses are known which comprise polyurethane, polyethylene or polystyrene foam bonded to a flexible water-impermeable sheet, but these do not meet all modern Building Regulations.
According to the present invention there is provided a bonded damp-proof course comprising rigid fire-resistant synthetic polymer foam and a water-impermeable sheet.
The damp proof course of the invention must be rigid. By rigid we mean the damp proof course is self-supporting and cannot be rolled up.
The damp proof course is bonded. By bonded, we mean the layers of the damp-proof course are held together with adhesive or they are laminated together, for example by applying the foam to the sheet during manufacture of the foam.
The damp-proof course comprises at least two layers, one of which is a water-impermeable sheet and the other is a rigid fire-resistant synthetic polymer foam. The water-
<Desc/Clms Page number 2>
impermeable sheet must prevent water from passing through.
Preferably, the water-impermeable sheet is flexible.
Examples of water-impermeable sheets include polyethylene sheets, particularly those conforming to BS 6515: 1984 (1996), modified polypropylene sheets, ethylene propylene diamine monomer (EPDM) rubber sheets, butyl rubber sheets, bitumen polymer sheets, plasticised polyvinyl chloride (PVC) sheets, pitch/PVC and polyvinyl polymer sheets, if necessary blended with rubbers or plasticisers to make them flexible.
The synthetic polymer foam of the present invention must be fire-resistant. That is, the foam may be inherently fire-resistant, or may be a foam treated with fire retardant chemicals. By fire-resistant we mean that the foam achieves results which enables it to be given a Class 0 Fire Rating according to the Building Regulations for England and Wales and for Scotland, when tested to BS 476: Part 6: 1989 (Fire Propagation Test) and to BS 476: Part 7: 1987 (1993) (Surface Spread of Flame Test). By fire resistant it is also meant that the complete damp proof course burns with difficulty and acts as a barrier to flame penetration for at least 30 minutes according to tests based on the principles pf BS 476: Part 20: 1987.
The fire-resistant synthetic polymer foam of the present invention must be thermosetting. That is, the foam used will not melt, or shrink excessively, when it gets hot. A foam which is not thermosetting, or which is thermoplastic, will melt and will not stay in place to act as a barrier to flames. Felt is not a suitable alternative to foam in the present invention.
Preferably, the fire-resistant synthetic polymer foam has a substantially closed cell structure to minimise
<Desc/Clms Page number 3>
absorbance of water and provide efficient thermal insulation.
In a preferred aspect of the present invention, the fireresistant synthetic polymer foam used has a density in the range of 30 to 60kg/m3. More preferably, the foam used has a density in the range of 35 to 45kg/m3.
Preferably, the fire-resistant synthetic polymer foam used is at least 15mm thick.
Examples of synthetic polymer foams which can be used include polyisocyanurate foam, polyurethane foam which has been treated with fire-retardant chemicals, polyfuran foam and phenol-formaldehyde foam. Preferably, the fireresistant synthetic polymer foam is phenol-formaldehyde foam.
The fire-resistant synthetic polymer foam of the present invention may be in strips 100mm wide by 1200mm long and the water-impermeable sheet may be 180mm wide by 1300mm long leaving a selvedge of 40mm along each long side and of 100mm at one end. However, these dimensions are not critical.
One fire-resistant synthetic polymer foam which was tested for use in the damp proof course of the present invention is phenol-formaldehyde foam. Using this foam provided a fire-resistant damp proof course having excellent thermal insulation and which is very easy to handle. Phenol formaldehyde foam is inherently fire resistant and rigid because of its particular chemical composition and structure. It is a good thermal insulant because it comprises substantially closed cells of a particular size.
The fire-resistant synthetic polymer foam may have a facing on one or both sides. Preferred facings include
<Desc/Clms Page number 4>
glass fibre tissue, aluminium foil, paper, glass fibre reinforced paper and combinations or laminates of these.
Facings improve structural integrity, helping to keep the foam together and protect it from damage. In addition, facings have the advantage of enabling foams to be bonded more easily to the water-impermeable sheet.
The damp-proof course of the present invention, properly installed, has thermal-insulating properties and is an effective barrier to the passage of flame. In addition, the damp-proof course is an effective barrier to the passage of water.
An advantage of using the damp proof course of the present invention is that it is light in weight.
A further advantage of the rigid fire-resistant insulating damp proof course of the present invention is that it is far easier to handle in comparison with known fireresistant damp proof courses which use materials such as compressible mineral fibre insulation and have a tendency to be floppy and less easily positioned.
An embodiment of the present invention will now be described in more detail, by way of example, with reference to the drawing, in which: The single Figure is part of a section through a damp-proof course of the present invention.
The damp-proof course (1) shown in the drawing comprises four layers. The first layer (2) is a water-impermeable sheet comprising pitch/PVC blended with synthetic rubber, plasticisers or other additives to render it flexible.
<Desc/Clms Page number 5>
This water-impermeable sheet (2) is bonded, using adhesive, to a glass fibre facing (3) on a layer of phenol-formaldehyde foam (4). The foam layer (4) has another facing of aluminium foil (5) on its opposite surface.
The damp proof course of the present invention, in addition to having thermal-insulating and fire resistant properties, is light, easy to handle and easy to install. Further, when properly installed, the damp proof course of the present invention prevents the passage of water into the building at the wall around the openings and limits thermal bridging around openings, reducing heat loss and local condensation.

Claims (12)

  1. Claims 1. A bonded damp-proof course comprising a rigid fire- resistant thermosetting synthetic polymer foam and a water-impermeable sheet.
  2. 2. A bonded damp-proof course according to claim 1 in which the water-impermeable sheet is selected from polyethylene sheets, particularly those conforming to BS 6515: 1984 (1996), modified polypropylene sheets, ethylene propylene diamine monomer (EPDM) rubber sheets, butyl rubber sheets, bitumen polymer sheets, plasticised polyvinyl chloride (PVC) sheets, and pitch/PVC sheets and polyvinyl polymer sheets if necessary blended with rubbers or plasticisers to render them flexible.
  3. 3. A bonded damp-proof course according to claim 1 or 2 in which the synthetic polymer foam has a density of between 30 and 60 kg/m3.
  4. 4. A bonded damp-proof course according to claim 3 in which the synthetic polymer foam has a density of between 35 and 45kg/m3.
  5. 5. A bonded damp-proof course according to any of claims 1 to 4 in which the synthetic polymer foam is substantially closed cell in structure.
  6. 6. A bonded damp-proof course according to any preceding claim in which the synthetic polymer foam is inherently fire-resistant.
  7. 7. A bonded damp-proof course according to any of claims 1 to 5 in which the synthetic polymer foam is treated with fire-retardant chemicals.
    <Desc/Clms Page number 7>
  8. 8. A bonded damp-proof course according to any of claims 1 to 5 in which the synthetic polymer foam is selected from polyisocyanurate foam and polyurethane foam which have been treated with fire-retardant chemicals, polyfuran foam and phenol-formaldehyde foam.
  9. 9. A bonded damp-proof course according to claim 6 in which the synthetic polymer foam is phenol- formaldehyde foam.
  10. 10. A bonded damp-proof course according to any preceding claim in which the synthetic polymer foam has a facing on one or both sides.
  11. 11. A bonded damp-proof course according to claim 10 in which at least one of the facing (s) is any one of glass fibre tissue, aluminium foil, paper, glass fibre reinforced paper and combinations or laminates of these.
  12. 12. A damp-proof course substantially as described herein with reference to the drawing.
GB0215510A 2001-07-04 2002-07-04 Damp proof course Expired - Fee Related GB2378919B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0116357.5A GB0116357D0 (en) 2001-07-04 2001-07-04 Damp proof course

Publications (3)

Publication Number Publication Date
GB0215510D0 GB0215510D0 (en) 2002-08-14
GB2378919A true GB2378919A (en) 2003-02-26
GB2378919B GB2378919B (en) 2003-08-13

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB0116357.5A Ceased GB0116357D0 (en) 2001-07-04 2001-07-04 Damp proof course
GB0215510A Expired - Fee Related GB2378919B (en) 2001-07-04 2002-07-04 Damp proof course

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB0116357.5A Ceased GB0116357D0 (en) 2001-07-04 2001-07-04 Damp proof course

Country Status (1)

Country Link
GB (2) GB0116357D0 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008016668A2 (en) * 2006-08-02 2008-02-07 High Impact Technology, L.L.C. Layered panel structure including self-bonded thermoformable and non-thermoformable layer materials
GB2445824B (en) * 2006-11-09 2011-02-23 Advanced Composites Group Ltd Foamed tools
EP2345535A1 (en) 2010-01-18 2011-07-20 Armacell Enterprise GmbH Fire protection system for expanded polymers
AU2005202671B2 (en) * 2004-06-18 2011-08-11 Kingspan Insulation Pty Ltd Insulation Sheeting
EP2455221A1 (en) 2010-11-16 2012-05-23 Armacell Enterprise GmbH Fire protected elastomeric insulation
GB2503864B (en) * 2012-03-08 2014-09-03 Hexcel Composites Ltd Composite material for automated lay-up
EP3222416A1 (en) 2016-03-21 2017-09-27 Armacell Enterprise GmbH & Co. KG Composite material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105173056B (en) * 2015-08-12 2018-06-29 中国商用飞机有限责任公司北京民用飞机技术研究中心 A kind of wing tank protection lid and its moulding process

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1459529A (en) * 1964-12-08 1966-11-18 Villadsens Fab As Jens Waterproof system and insulation material that can be used for its realization
GB2144078A (en) * 1983-07-28 1985-02-27 Lewis Russell Jackson Insulated damp-proof course

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1459529A (en) * 1964-12-08 1966-11-18 Villadsens Fab As Jens Waterproof system and insulation material that can be used for its realization
GB2144078A (en) * 1983-07-28 1985-02-27 Lewis Russell Jackson Insulated damp-proof course

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2005202671B2 (en) * 2004-06-18 2011-08-11 Kingspan Insulation Pty Ltd Insulation Sheeting
WO2008016668A2 (en) * 2006-08-02 2008-02-07 High Impact Technology, L.L.C. Layered panel structure including self-bonded thermoformable and non-thermoformable layer materials
WO2008016668A3 (en) * 2006-08-02 2008-07-03 High Impact Technology Llc Layered panel structure including self-bonded thermoformable and non-thermoformable layer materials
US7790274B2 (en) 2006-08-02 2010-09-07 High Impact Technology, Llc Layered panel structure including self-bonded thermoformable and non-thermoformable layer materials
US7943232B2 (en) 2006-08-02 2011-05-17 High Impact Technology, Llc Layered panel structure including self-bonded layers of thermoformable and non-thermoformable materials
GB2445824B (en) * 2006-11-09 2011-02-23 Advanced Composites Group Ltd Foamed tools
US8784089B2 (en) 2006-11-09 2014-07-22 Umeco Structural Materials (Derby) Limited Foamed tools
EP2345535A1 (en) 2010-01-18 2011-07-20 Armacell Enterprise GmbH Fire protection system for expanded polymers
EP2455221A1 (en) 2010-11-16 2012-05-23 Armacell Enterprise GmbH Fire protected elastomeric insulation
US9976689B2 (en) 2010-11-16 2018-05-22 Armacell Enterprise Gmbh & Co. Kg Fire protected elastomeric insulation
GB2503864B (en) * 2012-03-08 2014-09-03 Hexcel Composites Ltd Composite material for automated lay-up
EP3222416A1 (en) 2016-03-21 2017-09-27 Armacell Enterprise GmbH & Co. KG Composite material

Also Published As

Publication number Publication date
GB0215510D0 (en) 2002-08-14
GB2378919B (en) 2003-08-13
GB0116357D0 (en) 2001-08-29

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20080704